The Ghost of J/C Past
A new plot has been added to the Borg Plot Classification, #26: The Ghost of J/C Past. This fanfic convention appears to have been founded by Liz Barr in Accessory to Fanfic.
The official Borg Plot Classification is housed in the moribund JetCWiki, where you can find examples of each standard J/C fanfic plot. The C/7 version is at Wikifection, the center for all things C/7. I also keep (maintain would be too strong a word) both a J/C and a C/7 Borg Plot Classification of my stories.